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hydrothermal vent
(Encyclopedia) hydrothermal vent, crack along a rift or ridge in the deep ocean floor that spews out water heated to high temperatures by the magma under the earth's crust. Some vents are in areas of…Machu Picchu
(Encyclopedia) Machu PicchuMachu Picchumäˈch&oomacr; pēkˈch&oomacr; [key], Inca site in Peru, about 50 mi (80 km) NW of Cuzco. It is perched high upon a rock in a narrow saddle between two…civet
(Encyclopedia) civetcivetsĭvˈət [key] or civet cat, any of a large group of mostly nocturnal mammals of the Old World family Viverridae (civet family), which also includes the mongoose. Civets are…cuttlefish
(Encyclopedia) cuttlefish, common name applied to cephalopod mollusks that have 10 tentacles, or arms, 8 of which have muscular suction cups on their inner surface and 2 that are longer and can shoot…koala
(Encyclopedia) koalakoalakōäˈlə [key], arboreal marsupial, or pouched mammal, Phascolarctos cinereus, native to Australia. Although it is sometimes called koala bear, or Australian bear, and is…fair
(Encyclopedia) fair, market exhibition at which producers, traders, and consumers meet either to barter or to buy and sell goods and services. Before the development of transportation and marketing,…waters, territorial
(Encyclopedia) waters, territorial, all waters within the jurisdiction, recognized in international law, of a country. Certain waters by their situation are controlled by one nation; these include…vulture
(Encyclopedia) vulture, common name for large birds of prey of temperate and tropical regions. The Old World vultures (family Accipitridae) are allied to hawks and eagles; the more ancient American…Protista
(Encyclopedia) ProtistaProtistaprōtĭsˈtə [key] or ProtoctistaProtoctistaprōˌtŏktĭsˈtə [key], in the five-kingdom system of classification, a kingdom comprising a variety of unicellular and some…paleomagnetism
(Encyclopedia) paleomagnetism, study of the intensity and orientation of the earth's magnetic field as preserved in the magnetic orientation of certain minerals found in rocks formed throughout…Trending
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